1 files changed, 24 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth/OpenId/OpenIdRelyingParty.cs b/src/DotNetOpenAuth/OpenId/OpenIdRelyingParty.cs
index f25bcaa..f5e2d9c 100644
--- a/src/DotNetOpenAuth/OpenId/OpenIdRelyingParty.cs
+++ b/src/DotNetOpenAuth/OpenId/OpenIdRelyingParty.cs
@@ -11,6 +11,7 @@ namespace DotNetOpenAuth.OpenId {
 	using System.Text;
 	using DotNetOpenAuth.Messaging;
 	using DotNetOpenAuth.OpenId.ChannelElements;
+	using DotNetOpenAuth.OpenId.Messages;
 
 	/// <summary>
 	/// Provides the programmatic facilities to act as an OpenId consumer.
@@ -27,5 +28,28 @@ namespace DotNetOpenAuth.OpenId {
 		/// Gets the channel to use for sending/receiving messages.
 		/// </summary>
 		public Channel Channel { get; internal set; }
+
+		/// <summary>
+		/// Gets an association between this Relying Party and a given Provider.
+		/// A new association is created if necessary and possible.
+		/// </summary>
+		/// <param name="provider">The provider to create an association with.</param>
+		/// <returns>The association if one exists and/or could be created.  Null otherwise.</returns>
+		internal Association GetAssociation(ProviderEndpointDescription provider) {
+			ErrorUtilities.VerifyArgumentNotNull(provider, "provider");
+
+			var associateRequest = AssociateRequest.Create(provider);
+			var associateResponse = this.Channel.Request(associateRequest);
+			var associateSuccessfulResponse = associateResponse as AssociateSuccessfulResponse;
+			var associateUnsuccessfulResponse = associateResponse as AssociateUnsuccessfulResponse;
+			if (associateSuccessfulResponse != null) {
+				return associateSuccessfulResponse.CreateAssociation(associateRequest);
+			} else if (associateUnsuccessfulResponse != null) {
+				// TODO: code here
+				throw new NotImplementedException();
+			} else {
+				throw new ProtocolException(MessagingStrings.UnexpectedMessageReceivedOfMany);
+			}
+		}
 	}
 }